Possible Clues:

• Famous army retained by aristocrat
• It's nothing but cant to a remarkable extent
• 'Can't, perhaps, be known so well (7)'
• It's a poor explanation for eating off the floor
• Perhaps cannot be without such a bit of furniture
• Nothing famous, and that's flat
• Famous feature of busy restaurant?
• Worthy of remark
• An exceptional lack of furniture
• Salient